Refrigeration



May 14, 1946. V

D. a. SMEILLIE REFRIGERATION Filed Dec. 8, 1945 1 I I 1 I I I 1/ 1 7/1 In, 1 I z I INVENTOR. ,Donald 6. Smellie Patented May 14, 1946REFRIGERATION Donald G. Smellie, Canton, Ohio, assignor to The HooverCompany, North Canton, Ohio, a corp'oration of Ohio Application December8, 1943, Serial No. 513,345

11 Claims.

This invention relates to refrigeration and more particularly to acombined cooling air and products of combustion flue for a gas firedrefrigerator especially designed for use, but in its broadest aspect notso limited, with a dual intermittent absorption refrigerating apparatus.

According to the present invention the back wall of the cooling air flueof a domestic refrigerator cabinet also forms the retaining means andextension for the products of combustion flue having a lining in theform of pre-fabricated insulating members.

For the purposes of illustration, the invention has been disclosed incombination with two intermittent absorption refrigerating unitsoperating alternately on the absorption-evaporation andgeneration-condensation phases. The intermittent absorptionrefrigerating unit per seforms no part of the present invention exceptin combination with the novel combined cooling air products ofcombustion flue of this invention. The construction and operation of thetwo intermittent absorption refrigerating units per so are described andillustrated in an application for United States Letters Patent by CurtisC. Coons, Serial No. 450,980 filed July 15, 1M2.

The generator-absorbers of the intermittent unit are arranged at eachside of the rear of the cabinet so as to allow free passage for thecooling air over the heat rejecting parts of the apparatus which arearranged transversely across the back of the cabinet for vertical flowof cooling air thereover. The plate for the cooling air flue is in theform of a sheetmetal stamping with a central shaped portion of channelformation to form. the rear wall of the cooling air flue proper withU-shaped retaining and extension portions at either side thereof toretain the lining of the products of combustion flues in positionagainst the rear of the cabinet and which form an extension of theproducts of combustion fines of the generator-absorbers to conduct theproducts of combustion to the top of the cabinet where they will difiuseinto the room air and also serve to. increase the flow of cooling airover the heat rejecting parts of theappapieces conduits for conductingthe products of combustion from each generator-absorber to the top ofthe, cabinet. The U-shaped extensions of the sheet metal stampingembrace the elongated cross-sectionally U-shaped insulating members whenthe stamping is secured to the rear of the cabinet so as to hold thelining for the products of combustion flue extension in a position tocon- Figure 1 is a cross-sectional view of two intermittent absorptionrefrigerating units assembled with a domestic refrigerator cabinetcombined with the combined cooling air and products of combustion flueof this invention.

Figure 2 is a transverse-sectional view taken on line, 2--2 of Figure 1,and

Figure 3 is an isometric view of the sheet metal stamping which formboth the cooling air flue and the extension of the products ofcombustion flue.

Referring to Figures 1 and 2, the refrigerating apparatus includes twogenerator-absorbers A, A mounted on the rear wall l2 of. the cabinet innear the corners thereofand adjacent to the bottom of the cabinet. Thegenerator-absorbers A, A are heated by gas burners, one of which isshown at I 4. The generator-absorbers A, A have products of combustionfiues l6, l6 extending longitudinally therethrough so that the productsof combustion produced when the burners are ignited will drive offrefrigerant vapor from the'absorbent contained in the generator,-absorbers A, A.

The refrigerating units also include air cooled primary condensers C, Cextending across the rear wall of the cabinet In near the upper endthereof. Immediately below the primary condensers C, C and alsoextending across the back wall 12 of the cabinet l0 are secondarycondensers l8, l8 which form a part of an indirect cooling circuit forthe generator-absorbers A, A, the construction and operation of which isdescribed and illustrated in the application for United States LettersPatent by Curtis C. Coons, Serial No. 450,980 filed July 15, 1942.

The combined cooling air and products of combustion flue 20 is generallyindicated by the reference character 20, and is mounted on the back wallII of the, cabinet Ill. The flue 20 is formed of a, metal stamping andhas a channel shaped portion 22 with its open side facing the cabinetwall l2 and overlying both the primary condensers C, C and the secondarycondensers l8, l8.

Integral with the legs of the channel shaped portion 20 arecross-sectionally U-shaped extensions 24 and 26, also having their opensides facing the wall l2 of the cabinet l0. Integral lateral lugs 28 and30 are provided on the extensions 24 and 28 for securing the flue 20 tothe rear wall l2 of the cabinet i0.

Each cross-sectionally U-shaped extension 2 and 26 in cooperation withthe rear wall E2 of the cabinet forms extensions for the products ofcombustion fiues l6, iii of the generator-absorbers A, A.

It has been found desirable to insulate the products of combustion fluesof gas fired refrigerating apparatus and for this purpose theprefabricated elongated cross-sectionally U-shaped members 32 and 34 andthe flat elongated insulating members 36 and 38 have been provided. Themembers 32 and 34 are shaped to fit the interior of thecross-sectionally U-shapedextensions 24 and 26 and have their open sidespositioned against the flat members 38 and 38 which in turn lie againstthe rear wall not the cabinet It, An opening 40 is formed at the bottomof the framework 42 for the entrance of cooling air and a screen 44 isprovided at the top for its exit.

To assemble the combined cooling air and products of combustion due 20to the cabinet it is merely necessary to position the members 32, 34, 36and 38 in the extensions 24 and 26 and secure the flue 20 to the wall 12by any suitable means such as by screws so that the conduits formedbetween the members 32, 34, 36 and 38 form extensions of the products ofcombustion flues l6, IS.

The long passage formed by the channel portion 22 of the flue 20 havingboth the primary and secondary condensers positioned therein induces arapid circulation of air over the heat rejecting portions of therefrigerating apparatus while the exit of hot flue gases from the screen44 induces an additional flow of cooling air over the heat rejectingportions of the apparatus.

From the foregoing it canbe seen that this invention provides a combinedcooling air and products of combustion flue which is easilymanufactured, easily assembled with the cabinet and which formsextensions for the products of combustion flues for a gas firedrefrigerator in addition to forming a cooling air passageway fordirecting cooling air over the heat rejecting parts of the refrigerator.n

While I have shown but a single embodiment products of combustionpassage to the top of said cabinet; said flue being in the form of astamping having an inwardly facing recess embracing a lining ofinsulating material which forms the conduit for products of combustionso as to hold it in position.

2. A products of combustion flue for an absorption refrigeratingapparatus in combination with a refrigerator cabinet comprising, anelongated flat piece of insulating material lying against a wall of saidrefrigerator cabinet, an elongated of my invention it is to beunderstood that this embodiment is to be taken as illustrative only andnot in a limiting sense. I do not wish to be limited to the particularstructure shown as described but to include all equivalent variationsthereof except as limited by the scope of the claims.

I claim: I

1. In combination, a refrigerator cabinet, an air cooled absorptionrefrigerating apparatus as: sociated therewith, said apparatus having avessel with a passage for products of combustion. and a combined coolingair and products of combustion flue attached to said cabinet, said fluebeing so constructed and arranged as to form an air passageway for theflow of cooling air over the heat rejecting parts of said apparatus anda conduit for products of combustion from said cross-sectionallyU-shaped piece of insulating material having its open side lying againstsaid fiat piece of insulating material and means for securing both ofsaid pieces of insulating material against said cabinet wall.

3. A combined cooling air and products of combustion flue for a gasfired refrigerator in combination with a refrigerator cabinetcomprising, a channel shaped member attached to a wall of saidrefrigerator cabinet with the open side of the channel facing thecabinet wall, a U-shaped extension integrally connected to one leg ofsaid channel shaped member with the open side of the U facing thecabinet wall, an elongated crosssectionally U-shaped piece of insulatingmaterial lying in said U-shaped extension with the open side of the Ufacing the cabinet wall and a flat elongated piece of insulatingmaterial lying between the open side of said U-shaDed piece ofinsulating material and said'cabinet wall.

4. A combined cooling air and products of combustion flue for a gasfired refrigerator in combination with a refrigerator cabinetcomprising, a channel shaped membe attached to a wall of saidrefrigerator cabinet with the open side of the channel facing thecabinet wall, a pair of U- shaped extensions integrally connected to thelegs of said channel shaped member with the open side thereof facing thecabinet wall, an elongated cross-sectionally U-shaped' piece ofinsulating material lying in each of said U-shaped extensions with theopen side of the U facing the cabinet wall and a flat elongated piece ofinsulating material lying between the open side of each of said U-shapedpieces of insulating materal and said cabinet wall.

5. In combination, a domestic refrigerator cabinet, two intermittentabsorption refrigerating units each having a generator-absorber with aproducts of combustion flue extending longitudinally therethrough, anair cooled primary condenser and an indirect cooling circuit for eachgenerator-absorber having an air cooled secondary condenser, said unitsbeing mounted on an outer wall of said cabinet with thegeneratorabsorbers positionednear the corners of said cabinet adjacentthe bottom thereof with the products of combustion flues extending in avertical direction and with the primary and secondary condensersarranged across the wall of the cabinet above the generator-absorbersand a sheet metal backing plate for said cabinet having three channelsfacing the cabinet well. one centrally located and overlying saidprimary and secondary condensers to direct cooling air thereover, andtwo laterally located. extending upwardly from said generator-absorbersand forming extensions of said product of combustion lines.

.6. In combination, a domestic refrigerator cabinet,- two intermittentabsorption refrigerating units.v each having a generator-absorber with8. products of combustion flue extending longitudinally therethrough. anair cooled primary condenser and an indirect cooling circuit for eachgenerator-absorber having an air cooled secondary condenser, said unitsbeing mounted on an outer wall of said cabinet with thegeneratorabsorbers positioned near the corners of said cabinet adjacentthe bottom thereof with the products of combustion flues extending in avertical direction and with the primary. and secondary condensersarranged across the wall of the cabinet above said generator-absorbers;a sheet metal backing plate for said cabinet having three channelsfacing the cabinet wall, one centrally located and overlying saidprimary and secondary condensers to direct cooling air thereover, andtwo laterally located extending upwardly from said generator-absorbersand forming extensions of said products of combustion dues. and aninsulating lining for K said laterally located channels.

'2'. In combination, a domestic refrigerator cabinet, two intermittentabsorption refrigerating units each having a generator-absorber with aproducts of combustion flue extending longitudinally therethrough, anair cooled primary condenser and an indirect cooling circuit for eachgenerator-absorber having an air cooled secondary condenser, said unitsbeing mounted on an outer wall of said cabinet with thegenerator-absorbers positioned near the corners of said cabinet adjacentthe bottom thereof with the products of combustion flues extending in avertical direction and with 'said primary and secondary condenserspositioned across the wall of said cabinet above saidgenerator-absorbers, a sheet metal backing plate for said cabinet havingthree channels facing the cabinet wall, one centrally located andoverlying said primary and secondary condensers to direct cooling airthereover, and two laterally located extending upwardly from saidgenerator-absorbers and forming extensions of said products-o!combustion fines, and an insulating lining for said laterally locatedchannels, said linings each comprising an elongated cross-sectionallyU-shaped member of insulating material with its open side lying againsta flat elongated piece of insulating materialfiying against the wall ofsaid cabinet.

8. In combination, a domestic refrigerator cabinet, an absorptionrefrigerating apparatus having a vessel with a products of combustionflue extending longitudinally therethrough, an air cooled heat rejectingvessel, said apparatus bein secured to a wall of said cabinet with saidproducts of combustion flue extending vertically near the lower end ofsaid wall and the heat rejecting vessel positioned crosswise of saidwall near the upper end thereof and a backing plate for said wallcomprising a channel shaped member overlying said heat rejecting vesselto direct cooling air thereover and an integral extension on saidchannel shaped member forming an extension for said products ofcombustion flue.

9. In combination, a domestic refrigerator cabinet, an absorptionrefrigerating apparatus hav-' ing a vesselwith a products of combustionflue extending longitudinally therethrough, an. air

cooled heat rejecting vessel, said apparatus being.

secured to a wall of said cabinet with said products of combustion fluesextending vertically near the lower end of said wall and the heatrejecting vessel positioned crosswise of said wall near the upper endthereof,'a backing plate for said wall comprising a channel shapedmember overlying said heat rejecting vessel to direct cooling airthereover and an integral extension on said chan v I nel shaped memberforming an extension for said products of combustion ilue and aninsulating lining for said extension comprising an elongatedeross-sectionally U-shaped member of insulating material having its openside lying against a flat elongated piece of insulating material lyingagainst said cabinet wall.

iii. In combination, a domestic refrigerator cab inet, two gasfiredintermittent absorption refrigcrating units associated with saidcabinet with the generator-absorbers of said units mounted in a verticalposition at the rear corners oi the back wall of said cabinet near thebottom thereof and with the heat rejecting portions of said units poshtioned across the back wall of said cabinet near the upper end thereof,and acombined cooling air and products oi. combustion flue secured tothe back' wall of said cabinet above said generator-absorbers, said flueincluding a channel shaped portion overlying the heat rejecting portionsof said units to form a passage for directing cooling air thereover andtwo lateral channels extending from the top of said generator-absorbersto the top or said cabinet to form products of combustion passages.

11. In combination, a domestic refrigerator cabinet, two gas firedintermittent absorption refrigwall oi? said cabinet near the bottomthereof and with the heat rejecting portions of said units po-,-

sitioned across the back wall-oi said cabinet near the upper endthereof, a combined cooling air and products of combustion flue securedto the back wall of said cabinet above said generator-absorbers, saidflue including a channel shaped portion overlying the heat rejectingportions of said units to form a passage for directing cooling airthereover and two lateral channels extending from the top or saidgenerator-absorbers to the top of said cabinet to term products ofcombustion passages and an insulating lining for each of said lateralchannels.

' DONALD G. SMELL-IE.

